Thunderstorms capable of producing heavy rain in short periods of time are predicted.

"Rainfall rates could be intense," the National Weather Service warned. "Burn scars from this summer and the summer of 2012 will be susceptible to flash flooding a mudslides. Urban areas will also be susceptible to flooding."

The storms will have the potential to produce rainfall rates of an inch an hour. Most will be tracking north at around 20 mph or faster.

The weather service said people should remain alert to changing weather conditions.